<template>
    <div id="component_piechart"></div>
</template>

<script>
import echarts from 'echarts'

function genData (count) {
    var nameList = [
        '赵', '钱', '孙', '李', '周', '吴', '郑', '王', '冯', '陈', '褚', '卫', '蒋', '沈', '韩', '杨', '朱', '秦', '尤', '许', '何', '吕', '施', '张', '孔', '曹', '严', '华', '金', '魏', '陶', '姜', '戚', '谢', '邹', '喻', '柏', '水', '窦', '章', '云', '苏', '潘', '葛', '奚', '范', '彭', '郎', '鲁', '韦', '昌', '马', '苗', '凤', '花', '方', '俞', '任', '袁', '柳', '酆', '鲍', '史', '唐', '费', '廉', '岑', '薛', '雷', '贺', '倪', '汤', '滕', '殷', '罗', '毕', '郝', '邬', '安', '常', '乐', '于', '时', '傅', '皮', '卞', '齐', '康', '伍', '余', '元', '卜', '顾', '孟', '平', '黄', '和', '穆', '萧', '尹', '姚', '邵', '湛', '汪', '祁', '毛', '禹', '狄', '米', '贝', '明', '臧', '计', '伏', '成', '戴', '谈', '宋', '茅', '庞', '熊', '纪', '舒', '屈', '项', '祝', '董', '梁', '杜', '阮', '蓝', '闵', '席', '季', '麻', '强', '贾', '路', '娄', '危'
    ];
    var legendData = [];
    var seriesData = [];
    var selected = {};
    for (var i = 0; i < count; i++) {
        var name = Math.random() > 0.65
            ? makeWord(4, 1) + '·' + makeWord(3, 0)
            : makeWord(2, 1);
        legendData.push(name);
        seriesData.push({
            name: name,
            value: Math.round(Math.random() * 100000)
        });
        selected[name] = i < 6;
    }

    return {
        legendData: legendData,
        seriesData: seriesData,
        selected: selected
    };

    function makeWord(max, min) {
        var nameLen = Math.ceil(Math.random() * max + min);
        var name = [];
        for (var i = 0; i < nameLen; i++) {
            name.push(nameList[Math.round(Math.random() * nameList.length - 1)]);
        }
        return name.join('');
    }
}

export default {
    name: 'PieEChart',
    methods: {
        drawChart: function (data) {
            var option = {
                title: {
                    text: '推荐热词统计',
                    subtext: '纯属虚构',
                    left: 'center'
                },
                tooltip: {
                    trigger: 'item',
                    formatter: '{a} <br/>{b} : {c} ({d}%)'
                },
                legend: {
                    type: 'scroll',
                    orient: 'vertical',
                    right: 10,
                    top: 20,
                    bottom: 20,
                    data: data.legendData,

                    selected: data.selected
                },
                series: [
                    {
                        name: '姓名',
                        type: 'pie',
                        radius: '55%',
                        center: ['40%', '50%'],
                        data: data.seriesData,
                        emphasis: {
                            itemStyle: {
                                shadowBlur: 10,
                                shadowOffsetX: 0,
                                shadowColor: 'rgba(0, 0, 0, 0.5)'
                            }
                        }
                    }
                ]
            };
            const myChart = echarts.init(document.getElementById('component_piechart'));
            myChart.setOption(option);
        }
    },
    mounted: function () {
        var data = genData(12);
        this.drawChart(data);
    }
}
</script>

<style scoped>
#component_piechart {
    width: 100%;
    height: 100%;
}
</style>